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OM4213 7/11
GENERAL INSTRUCTIONS
Lubricant Required For System
Grease requirements will depend on ambient
temperatures encountered during truck operation:
• Above
32°C
(90°F)
multipurpose grease (MPG).
• -32° to 32°C (-25° to 90°F) - Use NLGI No. 1
multipurpose grease (MPG).
• Below -32°C (-25°F) - Refer to local supplier for
extreme cold weather lubricant requirements.
System Priming
The system must be full of grease and free of air
pockets to function properly. After maintenance, if the
primary or secondary lubrication lines were replaced,
it will be necessary to prime the system to eject all
entrapped air.
1. Fill lube reservoir with lubricant, if necessary.
2. To purge air from the main supply line, remove
the main supply line at the grease canister.
Connect an external grease supply to the line.
3. Remove plugs from each injector group in
sequence (right front, left front, and rear axle).
4. Using the external grease source, pump grease
until grease appears at the group of injectors
and re-install the pipe plug. Repeat for
remaining injector groups.
5. Remove the caps from each injector and
connect an external grease supply to the zerk
on the injector and pump until grease appears
at the far end of the individual grease hose or
the joint being greased.
Filter Assembly
Filter element (5, Figure 42-4) must be replaced if
bypass indicator (2) shows excessive element
restriction.
-
Use
NLGI
No.
2
Automatic Lubrication System - Section 42
FIGURE 42-4. FILTER ASSEMBLY
1. Housing
2. Bypass Indicator
3. O-Ring
4. Backup Ring
5. Element
Page 42-5
6. Spring
7. Bowl
8. O-Ring
9. Plug
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Troubleshooting
